This new report is the fourth in a series that assesses the extent to which 11 key states are fulfilling, promoting, or undermining 10 standards identified as critical elements of the nonproliferation and disarmament regime. Collectively, states fared worse on the majority of criteria when compared with the prior edition covering the 2013–2016 period.

China tests new ballistic missiles, part of a growing arsenal, according to a U.S. assessment.